ID

VAR-202101-1926

CVE

CVE-2021-3156

TITLE

Sudo set_cmd() is vulnerable to heap-based buffer overflow

DESCRIPTION

Sudo before 1.9.5p2 contains an off-by-one error that can result in a heap-based buffer overflow, which allows privilege escalation to root via "sudoedit -s" and a command-line argument that ends with a single backslash character. A heap-based overflow has been discovered in the set_cmd() function in sudo, which may allow a local attacker to execute commands with elevated administrator privileges.CVE-2021-3156 AffectedCVE-2021-3156 Affected. Relevant releases/architectures: RHEL 8-based RHEV-H for RHEV 4 (build requirements) - noarch, x86_64 Red Hat Virtualization 4 Hypervisor for RHEL 8 - noarch, x86_64 Red Hat Virtualization 4 Management Agent for RHEL 7 Hosts - noarch 3. These packages include redhat-release-virtualization-host, ovirt-node, and rhev-hypervisor. RHVH features a Cockpit user interface for monitoring the host's resources and performing administrative tasks. Bug Fix(es): * Previously, the Red Hat Virtualization Host (RHV-H) repository (rhvh-4-for-rhel-8-x86_64-rpms) did not include the libsmbclient package, which is a dependency for the sssd-ad package. Consequently, the sssd-ad package failed to install. With this update, the libsmbclient is now in the RHV-H repository, and sssd-ad now installs on RHV-H. (BZ#1868967) 4. Bugs fixed (https://bugzilla.redhat.com/): 1850939 - Hosted engine deployment does not properly show iSCSI LUN errors 1868967 - sssd-ad installation fails on RHV-H 4.4 due to missing libsmbclient from samba package in rhvh-4-for-rhel-8-x86_64-rpms channel 1889686 - CVE-2020-25684 dnsmasq: loose address/port check in reply_query() makes forging replies easier for an off-path attacker 1889688 - CVE-2020-25685 dnsmasq: loose query name check in reply_query() makes forging replies easier for an off-path attacker 1890125 - CVE-2020-25686 dnsmasq: multiple queries forwarded for the same name makes forging replies easier for an off-path attacker 1902315 - Rebase RHV-H 4.4 to RHV 4.4.4 1902646 - ssh connection fails due to overly permissive openssh.config file permissions 1909644 - HE deploy failed with "Failed to download metadata for repo 'rhel-8-for-x86_64-baseos-beta-rpms': Cannot download repomd.xml 1917684 - CVE-2021-3156 sudo: Heap buffer overflow in argument parsing 1921553 - RHVH upgrade to the latest 4.4.4-1 build will fail due to FileNotFoundError 1923126 - Hosted Engine setup fails on storage selection - Retrieval of iSCSI targets failed. Summary: Red Hat Ansible Automation Platform Resource Operator 1.2 (technical preview) images that fix several security issues. Description: Red Hat Ansible Automation Platform Resource Operator container images with security fixes. Ansible Automation Platform manages Ansible Platform jobs and workflows that can interface with any infrastructure on a Red Hat OpenShift Container Platform cluster, or on a traditional infrastructure that is running off-cluster. Solution: Before applying this update, make sure all previously released errata relevant to your system have been applied. Bugs fixed (https://bugzilla.redhat.com/): 1914774 - CVE-2021-20178 ansible: user data leak in snmp_facts module 1915808 - CVE-2021-20180 ansible module: bitbucket_pipeline_variable exposes secured values 1916813 - CVE-2021-20191 ansible: multiple modules expose secured values 1925002 - CVE-2021-20228 ansible: basic.py no_log with fallback option 1939349 - CVE-2021-3447 ansible: multiple modules expose secured values 5. - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 202101-33 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - https://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High Title: sudo: Multiple vulnerabilities Date: January 26, 2021 Bugs: #764986, #767364 ID: 202101-33 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======= Multiple vulnerabilities have been found in sudo, the worst of which could result in privilege escalation. Affected packages ================ ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/sudo < 1.9.5_p2 >= 1.9.5_p2 Description ========== Multiple vulnerabilities have been discovered in sudo. Please review the CVE identifiers referenced below for details. Impact ===== Local users are able to gain unauthorized privileges on the system or determine the existence of files. Workaround ========= There is no known workaround at this time. Resolution ========= All sudo users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/sudo-1.9.5_p2" References ========= [ 1 ] CVE-2021-23239 https://nvd.nist.gov/vuln/detail/CVE-2021-23239 [ 2 ] CVE-2021-23240 https://nvd.nist.gov/vuln/detail/CVE-2021-23240 [ 3 ] CVE-2021-3156 https://nvd.nist.gov/vuln/detail/CVE-2021-3156 [ 4 ] Upstream advisory (CVE-2020-23240) https://www.sudo.ws/alerts/sudoedit_selinux.html [ 5 ] Upstream advisory (CVE-2021-3156) https://www.sudo.ws/alerts/unescape_overflow.html Availability =========== This GLSA and any updates to it are available for viewing at the Gentoo Security Website: https://security.gentoo.org/glsa/202101-33 Concerns? ======== Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users' machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at https://bugs.gentoo.org. License ====== Copyright 2021 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. https://creativecommons.org/licenses/by-sa/2.5 . 8.1) - aarch64, ppc64le, s390x, x86_64 3. ========================================================================== Ubuntu Security Notice USN-4705-2 January 27, 2021 sudo vulnerability ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 14.04 ESM - Ubuntu 12.04 ESM Summary: Several security issues were fixed in Sudo. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. Original advisory details: It was discovered that Sudo incorrectly handled memory when parsing command lines. A local attacker could possibly use this issue to obtain unintended access to the administrator account. (CVE-2021-3156) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 14.04 ESM: sudo 1.8.9p5-1ubuntu1.5+esm6 Ubuntu 12.04 ESM: sudo 1.8.3p1-1ubuntu3.10 In general, a standard system update will make all the necessary changes. -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 ==================================================================== Red Hat Security Advisory Synopsis: Important: sudo security update Advisory ID: RHSA-2021:0224-01 Product: Red Hat Enterprise Linux Advisory URL: https://access.redhat.com/errata/RHSA-2021:0224 Issue date: 2021-01-26 CVE Names: CVE-2021-3156 ==================================================================== 1. Summary: An update for sudo is now available for Red Hat Enterprise Linux 7.4 Advanced Update Support, Red Hat Enterprise Linux 7.4 Telco Extended Update Support, and Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 2. Relevant releases/architectures: Red Hat Enterprise Linux Server AUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server E4S (v. 7.4) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional AUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server Optional E4S (v. 7.4) - ppc64le, x86_64 Red Hat Enterprise Linux Server Optional TUS (v. 7.4) - x86_64 Red Hat Enterprise Linux Server TUS (v. 7.4) - x86_64 3. Description: The sudo packages contain the sudo utility which allows system administrators to provide certain users with the permission to execute privileged commands, which are used for system management purposes, without having to log in as root. Security Fix(es): * sudo: Heap buffer overflow in argument parsing (CVE-2021-3156) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. 4. Solution: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 5. Bugs fixed (https://bugzilla.redhat.com/): 1917684 - CVE-2021-3156 sudo: Heap buffer overflow in argument parsing 6. Package List: Red Hat Enterprise Linux Server AUS (v. 7.4): Source: sudo-1.8.19p2-12.el7_4.2.src.rpm x86_64: sudo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm Red Hat Enterprise Linux Server E4S (v. 7.4): Source: sudo-1.8.19p2-12.el7_4.2.src.rpm ppc64le: sudo-1.8.19p2-12.el7_4.2.ppc64le.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.ppc64le.rpm x86_64: sudo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm Red Hat Enterprise Linux Server TUS (v. 7.4): Source: sudo-1.8.19p2-12.el7_4.2.src.rpm x86_64: sudo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm Red Hat Enterprise Linux Server Optional AUS (v. 7.4): x86_64: sudo-debuginfo-1.8.19p2-12.el7_4.2.i686.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-devel-1.8.19p2-12.el7_4.2.i686.rpm sudo-devel-1.8.19p2-12.el7_4.2.x86_64.rpm Red Hat Enterprise Linux Server Optional E4S (v. 7.4): ppc64le: sudo-debuginfo-1.8.19p2-12.el7_4.2.ppc64le.rpm sudo-devel-1.8.19p2-12.el7_4.2.ppc64le.rpm x86_64: sudo-debuginfo-1.8.19p2-12.el7_4.2.i686.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-devel-1.8.19p2-12.el7_4.2.i686.rpm sudo-devel-1.8.19p2-12.el7_4.2.x86_64.rpm Red Hat Enterprise Linux Server Optional TUS (v. 7.4): x86_64: sudo-debuginfo-1.8.19p2-12.el7_4.2.i686.rpm sudo-debuginfo-1.8.19p2-12.el7_4.2.x86_64.rpm sudo-devel-1.8.19p2-12.el7_4.2.i686.rpm sudo-devel-1.8.19p2-12.el7_4.2.x86_64.rpm These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from https://access.redhat.com/security/team/key/ 7. References: https://access.redhat.com/security/cve/CVE-2021-3156 https://access.redhat.com/security/updates/classification/#important https://access.redhat.com/security/vulnerabilities/RHSB-2021-002 8. Contact: The Red Hat security contact is <secalert@redhat.com>. More contact details at https://access.redhat.com/security/team/contact/ Copyright 2021 Red Hat, Inc. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIVAwUBYBB1htzjgjWX9erEAQjwNQ/9HBoqYFsK25G0+2QKqO2FTwr0G7P5gx3n 93VL0desDcpNXLdd4lwWcx1gAQkKSiYtMyFl5JdrqTznudDPo/V4dPBbPl3hkIr8 zGiiKTDErT2MeCm5T4RXJVFzCCJA78io7MENH0Wr0SVTybjljKs1m06egY120kC0 ax3v92dap0K6KNAlVLscRzc2p0veauF+cfpk+5+Zomzw89QRTrWYt7BBxUxFsk2u sS0t9cmT3UURXjsqdDjMmilxWbqmKzKePhWeCfu8zBNc+TacLSXBqZmPgSlB1V5U WTzSNIu3AGSpcniqcx0It4ncfmwGfmmekQ0U4ZTBLkM+fr7krikFiBFsf+jPaqvn PNFdJY318EAJWxzRGhf9UunlMVYrimjjNxqMU1LVIxIhRzQEi0BhlMIcFjIZp0UN Pa1nqJ0YKZbZ/+vvqzd6c6lALjsYBSOhkEpmr0ZivaXl1wIPB4cZ4yrKjMlO0DsP qsG4YmwIq+pl85wH4dPA2TG7mMF4CdWYvykUQlVfYSlGAXAllGaeNDAnySfi/FWE zXTdkjxc9uHojrhfUtX5pDoflFWoerbbaLK//fCTFuULhKfAhe5QidiCiU+LpFb2 aM23SHk+HZm8LnC2KM0fe0VzSk9fHWgOYXHx0iOYsqwRzHwe+d+AJ4bZkKxf2/pT /eC3svyPRxA=fsAW -----END PGP SIGNATURE----- -- RHSA-announce mailing list RHSA-announce@redhat.com https://www.redhat.com/mailman/listinfo/rhsa-announce

AFFECTED PRODUCTS

CVSS

PROBLEMTYPE DATA

THREAT TYPE

local

TYPE

buffer error

EXPLOIT AVAILABILITY

PATCH

EXTERNAL IDS

REFERENCES

CREDITS

This document was written by Timur Snoke.Statement Date:   February 15, 2021

SOURCES

LAST UPDATE DATE

2025-06-19T20:05:51.581000+00:00

SOURCES UPDATE DATE

SOURCES RELEASE DATE